Download e-book for iPad: California Science: Student Edition: Grade 4 by Dr. Jay K. Hackett

By Dr. Jay K. Hackett

ISBN-10: 0022843787

ISBN-13: 9780022843786

Lifestyles technology; residing issues desire strength, dwelling issues and their Environment.EARTH technology; Rocks adn Minerals, sluggish alterations on the earth, speedy alterations on Earth.PHYSICAL technological know-how; electrical energy, Magnetism.

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Extra info for California Science: Student Edition: Grade 4

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Question • Would more ants be attracted to an unpeeled piece of fruit or to a piece of fruit that was peeled? The students turned the question into a statement they could test. This statement is called a hypothesis. A hypothesis is an “if... ” statement. Here is the hypothesis proposed by the students: Hypothesis • If fruit is peeled, then more ants will be attracted to it. Can this hypothesis be tested? 14 Defining Variables The next step is to make a plan to test your hypothesis. The test for your hypothesis is your experiment.

How are the leaves different? Leaf Trait Leaf A ● leaves from two plants ● hand lens Step Leaf B Texture Color Size Shape Draw Conclusions Infer Tell what each leaf trait on the chart is for. For example, you might infer that fuzzy leaves are for catching rain. Colored leaves might be for attracting insects. Record your ideas. Explore More What leaf traits do both leaves have in common? Tell what each shared leaf trait is for. Make a plan to test your idea. f. Follow a set of written instructions for a scientific investigation.

Summarize the Main Idea Plants are living things. Most plants have roots, stems, and leaves. Think, Talk, and Write Main Idea How do plants use energy from the Sun? (pp. 26–27) Vocabulary What is photosynthesis? Green plants carry out photosynthesis to make food energy from sunlight, water, and carbon dioxide. Compare and Contrast How are the roles of a plant’s leaves and roots different? How are they alike? 2WTTS`S\b /ZWYS 2WTTS`S\b (pp. 28–31) Plants make up most of the biomass in an environment.

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California Science: Student Edition: Grade 4 by Dr. Jay K. Hackett

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